Yeah, and they've generally failed to impress me with their storytelling. I don't for a moment believe they're going to give warlocks conflict with their patrons because that's not the point of the game, it would just be a tangent unconnected to the main plot or side content. Larian has made a lot of content, but that doesn't make them miracle workers.
The have impressed me with the AMOUNT of storytelling the have tried to squeeze into the game. Whether or not you like the style is a different issue.
But a "generic" patron would not be in a position to offer "advice", and I wouldn't consider it worth the effort of adding an appearance for something that had no gameplay effect.